Full Idea
A third sort of rational account (after giving an image, or analysing elements) is being able to mention some mark which differentiates the object in question ('the sun is the brightest heavenly body').
Gist of Idea
A rational account involves giving an image, or analysis, or giving a differentiating mark
Source
Plato (Theaetetus [c.364 BCE], 208c)
Book Reference
Plato: 'Theaetetus', ed/tr. Waterfield,Robin [Penguin 1987], p.127
A Reaction
This is Plato's clearest statement of what would be involved in adding the necessary logos to your true belief. An image of it, or an analysis, or an individuation. How about a cause?